During his time in France, Greenwood played a crucial role in helping Marseille secure a second-place finish in Ligue 1 and qualify for the Champions League.
Greenwood's impressive performance last season saw him score 22 goals and provide six assists in just 36 appearances for Marseille.
While in Manchester, Greenwood was spotted training with a former Manchester United teammate, D'Mani Mellor. Mellor, who made one appearance for United in the Champions League, now plays for Macclesfield FC.